21006418092131 has 4 divisors (see below), whose sum is σ = 21294177244152. Its totient is φ = 20718658940112.

The previous prime is 21006418092119. The next prime is 21006418092133. The reversal of 21006418092131 is 13129081460012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21006418092131 - 2⁶ = 21006418092067 is a prime.

It is a super-2 number, since 2×21006418092131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21006418092133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143879575901 + ... + 143879576046.

It is an arithmetic number, because the mean of its divisors is an integer number (5323544311038).

Almost surely, 2^{21006418092131} is an apocalyptic number.

21006418092131 is a deficient number, since it is larger than the sum of its proper divisors (287759152021).

21006418092131 is an equidigital number, since it uses as much as digits as its factorization.

21006418092131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287759152020.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 21006418092131 in words is "twenty-one trillion, six billion, four hundred eighteen million, ninety-two thousand, one hundred thirty-one".